This came with the Tesla that I recently bought. I don't really like using it and condition is excellent. Selling it for $55 (plus shipping fee) Below is the description from official Tesla online store:
Constructed of lightweight mesh fabric with a collapsible rigid frame, the rear sunshade blocks two thirds of solar thermal load without compromising rearward visibility. Easily removable, the sunshade is installed onto the interior of the rear hatch window. When removed, the shade collapses and stores in a 16-inch diameter pouch.
Model S Rear Liftgate Sunshade
Constructed of lightweight mesh fabric with a collapsible rigid frame, the rear sunshade blocks two thirds of solar thermal load without compromising rearward visibility. Easily removable, the sunshade is installed onto the interior of the rear hatch window. When removed, the shade collapses and stores in a 16-inch diameter pouch.
Model S Rear Liftgate Sunshade